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Hot corrosion behaviour of plasma sprayed alumina + YSZ particle composite coating

  • Nanoscale and Nanostructured Materials and Coatings
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Abstract

Hot corrosion is one of the damage mechanisms in thermal barrier coatings (TBCs) due to the molten salt effects as a result of combustion of low quality fuel. In this study, the hot corrosion behaviour of alumina–yttria stabilized zirconia particle composite coatings produced by thermal spraying for use as a thermal barriers on industrial gas turbines and in jet engines was evaluated. Plasma sprayed coatings with three different amounts of alumina- yttria stabilized zirconia particle composite have been exposed to 50 wt % Na2SO4 + 50 wt % V2O5 corrosive molten salt temperatures at 1050°C for 60 hours. Damages in the coatings surface and cross section after hot corrosion tests have been studied by using a scanning electron microscope to observe the microstructure and x-ray diffraction techniques to analyze the phase composition. The results have shown that the amount of YVO4 crystals on the surface of YSZ coatings decrease while Al2O3 increases in YSZ + Al2O3 composition, therefore, the hot corrosion resistance of TBC improves with the addition of Al2O3.

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Authors and Affiliations

  1. İstanbul Technical University, Department of Metallurgical and Materials Engineering, 34469, Istanbul, Turkey

    Muhammet Karabaş & Yılmaz Taptik

  2. Akdeniz University, Vocational School of Technical Sciences, 07058, Antalya, Turkey

    Emre Bal

Authors
  1. Muhammet Karabaş
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  2. Emre Bal
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  3. Yılmaz Taptik
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Correspondence to Emre Bal.

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Karabaş, M., Bal, E. & Taptik, Y. Hot corrosion behaviour of plasma sprayed alumina + YSZ particle composite coating. Prot Met Phys Chem Surf 53, 859–863 (2017). https://doi.org/10.1134/S2070205117050069

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  • DOI: https://doi.org/10.1134/S2070205117050069

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